Sulphur burner



A. G. HINZKE SULPHUR BURNER.

APPLICATION FILED IUNE I7, 1921.

of the kettle with fresh sulp ment and construction of -`parts as herein- SULPUR BURNER.

Application filed .Tune 17, 1921. Serial No. 478,394.

To all lwhom t may concern.'

Be it knownthat I, ALBERT Gs'rAv HIN- zKE, a citizen of the United States, and

a resident of the city of Port Arthur, in

the district of Thunder Bay, in the Prov'- ince of Ontario, Canada', have invented certain new and useful Improvements in Sulphur Burners, of which the following is the specilication.

My invention relatesto improvements in sulphur burners of a type which is adaptable for use in the paper industryand also in sulphuric acid vand fertilizer plants where any grade of sulphur-is convertible into SO2 or any obtainable strength of sulphur dioxide gases, and the object of the invention is:

1st. To devise a .burner in which there is no choking of the outlet with sulphur deposits tending to decrease the draught;

2nd. In which the melting kettle is so constructed thereby enabling the sulphur 'tobe melted at the required speed.

3rd. In which the sticking of the needle valve due to the uneven expansion and .conl parts of the kettle is pretraction of the vented, in which the needle valve is conveniently located for ready manipulation and is so constructed that it can be readily cleaned out at any time.

4th. In which the clogging of the valve orifice by foreign matter isf-prevented.

5th. In which the danger to the operator by sulphurv ignition durin the charging ur is obviated. 6th. In which thetrays are soconstructed and supported as tofreely, expand and contract to prevent cracking due to the effect of.

heat an their weight andso that a maximum amount of circulation of the sulphur, air', and gases iseffected. A

7th. In which the chilling of the furnace by the entrance Iof fresh air is prevented and in which the gases and air are thoroughly mixed to completethe combustion of the gases.

8th. In which a damper of such a construction is provided that the air supply my be regulated `to any degreev of ineness.

nd it consists essentially ofthe arrangeafter more particularly explained.

Fig. 1 is a vertical sectional view through my sulphur burner.

as to provide greater l heat,

Speciicationof Letters Patent. Ptented June 2'?, i922.

Fig. 3 is a fragmentary enlarged plan detail of F ig. 2. Y

' ig. 4 vis a sectional view on line 4 4, Fig. 1.

Fig. 5 is asectional View on line 5 5, F ig. 1.

`ig. 6 is a sectional View on line 6 6, Fig. l. i FF ig. 7 is a sectional view on line 7 7,

ig. l. Fig. 8 is a detail view in elevationof one of the air supply doors.

,In the drawingslike characters of reference indicate corresponding parts in each figure.

is a sectional .view on line 2 2,

a portion of theparts shown 1n l is the body or shell of the burner which is composed of a sheet metal wall 2 and a brick lining 3, the bottom being also formed by a sheet metal wall 4 which ist riveted or otherwise suitably securedY to the lwall 2 and is also provided with a-'brick lining 5. 6 are a series of openings formed in the wall of the shell or body 1 and in each of which is located a door frame 7 provided with a vertically sliding-door 8 which is slidablyheld in side 4guides 9 formed in the side Wall'sof the door frame. Each door 8 is supported by counterweights 10' con-- nected tothe door by metall cords or cables 11 passing over-the pulleys 12 which are journalled o'n suitable studs extending from each' door frame 7. 1`

By v this means the doors 8 may be, raised and lowered and held in such raised andv lowered position without anyxfurther securing means:

. L 13 1s a base which is located onthe bottom lining 5-of the bod 1 ofthe-furnace y'centrally thereof, and is ormed by an annular topl portion 14, -the centralf'orfce of which is provided with a surrounding groove 15 for a-'purpose which will here'- 1nafter appear, and -by radial walls 16 which rest upon the bottom- 5 of the burner so as to provide intervening 'openings 17 for the passage of the gases, etc.

18 and 19 are cylindrical sections ,which are arranged one upon the other alternately to form a hollow column forming an outlet duct. .The lowermost section 1'8 rests at its lower vedge in the groove 1 5 of thebase l3, the top\of such section being provided with' i a similar groove 20 into which the lower portion of the section 19 fits. Similarly each section is built u one upon the other to form' the central co umn aforesaid.

From each section 18 extends a circular tray 2l the outer edge of the tray being turned up slightly at 22 so that the tray `1s slightly .dished on its upper face. It will be noted that the trays 21'extend into proximity to the interior surface of the shell l, leaving an annular space 23 for a purpose which will hereinafter appear.

It will also be noted that the outer edges ofthe trays 21 are slightly below the level ofthe door openings 6 formed in the shell 1. 24 are trays which extend from each section 19, being formed integral therewith. The trays 24 also extend into proximity to the interior surface of the shell 1, lbut in this case the annular opening formed therearound is filled with fire clay or other suitable fireproof material as indicated at 25.

The trays 24 are provided with a series of orifices 26 which are arranged around the section 19 as clearly indicated in Fig. 5.

It will also be seen on referring to Fig. 5 that the upperq face of the tray 24 is dished, the dished portion extending from its outer edge to between the orices 267 the upper edge of the orifice' bein per edge of the tray',.th1s portion gradually merging into such upper edge. i

27 is a cylindrical member which is disposed vertically resting at its lower end in the annular groove of the uppermost section 19. 28 is my melting kettle. The kettle 28 is divided into two portions 29 and 30, the abutting edges of which are provided with flanges 31 and 32 suitably bolted together. Ihe lower edge of the section 30 of the melt- 1ng kettle is provided with a flange 33 which rests upon and is secured to the top of the wall of the shell 1. The bottom ofthe kettle .28 converges downwardly at 34 to the horizontal wall 35 which forms the kettle i bottom and which is integral with the cylindrical member 27. 38 are bosses which extend radially from the bottom of the kettle 28 and are provided with needle valve orifices. 36. 37 is a needle valve provided with a spindle 39 which is threaded into the valve spindle base 40. 41 are' orifices which are formed in the top wallof the kettle 28. 42 are feed pipes which extend through the orifices 41- and depend downwardly into the kettle, the, upper edge of the feed pipe being flush 4with the upper face -of thekettle. 43

are hinged covers forming closures over the orlfices 41. 44 is an orifice which is formed in the center of the top of the kettle 28 and from which depends a cylindrical member 45 provided at its lower end with al surrounding groove 46 into which the upper edge of the cylindrical member 27 lits.

annular flange 47, the upper face of which is ona level with the upper edge of the downwardly convergingportion of the kettle bottom. 48 is a perforated plate which is divided radially into sections 49 as clearly indicated in Fig. 4. The outer edge of each section rests upon the upper portion of the inclined portion 34 of the kettle bottom. The

inner edge rests upon the annular flange 47.

49x is a pipe section provided at its lower end with an outwardly extending flange 50 resting upon the top of the kettle 28 so as.

'toregister with the central opening of the cylindrical member 44. The upper end of the pipe 49X is enlarged at 51 forming a shoulder 52 on which rests a perforated semi-.

spherical dome 53. 54 is an annular series vof port openings located inthe pipe 49X below `the shoulder 52. 55 isa similar serles of port openings formed above the shoulder '52 and also above the perforated dome 53.

56 are rollers which are revolvably carried upon the pipe 49 to extend radially therefrom below the port openings 54. 57 are which is secured the outlet air discharge pipe 65.

Having described the principal parts involved in my invention I will briefly describe the operation of the same. j

In starting the burner, the melting kettle must lbe filled with sulphur. A shovelful of sulphur must be also thrown through the door opening formed by the door frame 7 and ignited. The slidingdoors 8 are then all closed -except the two uppermost which are regulated to permit enough airctoburn the sulphur freely. When the internal heat has .been sufficiently raised to melt the sulphur 1n the melting kettle one of the needle valves 36 is opened in'order to permit the molten sulphur to flow down on; the trays as required.v y y The other needle valve on the opposite side of the machine is a spare oneand can be used or not as desired. The melted ,sulphur and the gases therefrom flow downward from the uppermost tray 24 going inwardly to pass through the orifices 26 on to thenext succeeding tray 21 flowing again upwardly over the edge of the tray 21,. on to the next succeeding tray 24 and then downwardly from tray to tray, the an- The member 27 is also provided with an nular stream following a serpentine course 130 of the bottom of the burnerbody or shell which acts as the final burning surface for the melted sulphur and indicates the maximum capacity of the burner.

openings 17 intervening between the radial walls 16 of the base 13 and through the central opening of the base passing upwardly through the hollow sections 18 and 19 forming a vertical duct together with the cylindrical members 27 and 44 and pipe 50 and passing through the perforated dome 53 into the elbow 60 which finally discharges the gases into the outlet pipe 65 leading to a suitable absorbing system.

All through the sulphur burning process the doors 8 are opened only enough tolet the right amount of air into the burner in order to burn the sulphur freely, and as a rule, the upper doors are opened more than the 'lower doors and itis best tof-graduate# the infiowing air downward to such an extent that the lowermost doors are almost shut.' w

When the hot gases enter the oxidizing chamber such gases .are only partly combusted and oxidized, and it is in this oxidizing chamber formed by the pipe enlargement land the perforated dome 53 that the gases receive their final treatment.

In opening the lower row of port openings 54 which are located beneath the perforated dome 53 enough air is let in, and the air and gas undergo a thorough mixing in passing through the perforated dome causing the final combustion and oxidation of .the gases.

The upper rowof ort openings located above the perforated ome are only opened slightly in order to observethe colour of the flame. Attention is called to the fact that the inner and outer overflow .openings of the trays formed in the one case by the annular' series of orifices 26 and in the other case by the annular opening 23,

the area of the central duct formed by the sections 18 and 19, sections 27 and 44,` and lower portionfof the pipe 50 in order lto retard the flow of the gases over the burning area and for that reason the outlet under and in the oxidizing chamber is gradually larger than the central chamber in order to let the gases oxidize in an expanded form. x From this description it will be seen that I have devised a burner so constructed asv to generate ,heat sufficient for the proper .meltingjof the sulphur for the reason that all the elements as sulphur, gas, and air pass in theA outer chamber from tray to tray downward until they reach the bottom of the burner where the hot Jgases enter and ascend the inner lchamber formed by the central duct thereby providing ample time for the From this lowest elevation the gases enter through the is twice as large as proper combustion of the gases which during'such process of combustion generate heat for melting the `sulphur charge, in which the needle valve is so constructed that there the valve orifices may be cleaned out by the insertion of a rod or similar device, in which the danger to the operator is obviated by the employment of the feed pipes 42 which serve to guard the operator from sulphur ignition in filling the kettle with yfresh sulphur and which is liable to take place, during hot summer weather, in which the trays are so constructed as to be supported independently of the shell or body of the burner and in such a way that they are free to expand and contract particularly in their centrall portion and such central portion is supported so that when the Darts are heated, there is no danger of their cracking due tor their weight, in which the gases are thoroughly mixed with the required amount of air before finally leaving. the burner so that they are thoroughly ignited and burnt before being finally discharged, in which there is noy danger of the supply of fresh air chilling the furnace as it 'has been pre-I viously found when a certain amount of inrushing air follows the inside of the outlet duct having a tendency to lower the temperature, the burning gases forming a central core surrounded by the inflowing air- 100 by my device this air is thoroughly intermixed with the gas so as to produce thorough combustion as hereinbefore referred to-in which I have provided doors -which may be readily manipulated so that air may be supplied with any degree of fineness required, and in which the entrance of foreign matter such as stones and pieces of wood passing through the melting kettle into the burner is prevented.

What I claim as my invention is:

1. A sulphur` burner comprising a body or shell having an open upper end, a melting kettle provided with feed supply orifices supported upon the open upper end of the shell,\valve controlled means for permitting the fiow of sulphur from the melting kettle into the shell, a central duct extending lthrough the melting kettle and shell into proximity with the lower end thereof, a dis'- 120 charge pipe leading from the upper end of the central duct and means for causing the flow of molten sulphur as it passes down- `ward to follow a serpentine course tothe lower end of the central duct through which `means for controlling .the flow of molten lsulphur `from the melting kettle into the body of the burner, a central duct 'extending through the melting kettle and downwardly through the body of the burner into proximity to the lower end base for the duct provided with radial orifices, and means for directing the flow of molten sulphur as it passes downward in a serpentine course to such radial openings through which the resulting gases pass into the duct and an outlet pipe connected to the upper end of the duct.

B. A sulphur burner comprising a body or shell having an open upper end, a melting kettle provided with feed supply orifices supported upon the open upper end of 4the shell, valve controlled means for permitting the flow of sulphurv from the melting` kettle into the shell, a central duct extending through the melting kettle and shell into proximity with the lower end`-thereof, a discharge pipe leading from the upperend of the Ycentral duct, and means for causing the flow of molten sulphur as it passes downward to follow a serpentine course to the lower end of the central duct through which the resulting hot gases'pass.

4. A sulphur burner comprising a body or shell having an open upper end, a melting kettle provided with -feed supply orices supportedupon the open upper y perforated dome carried within thecentral ductabove the aforesaid ports, a discharge pipe leading from the upper end of the central duct and means for causing the flow of molten sulphur as it passes downward to folthereof, a supporting charge pipe leading from the upper end end ofthe shell, valve controlled means for permitting low a serpentine course to the lowerend of the central duct through which the resulting hot gases pass.

5. A sulphur burner comprising a body or shell having an open upper end, a melting kettle provided with feed supply orifices supported upon the open upper end of the shell, valve controlled means for permitting the flow of sulphur from the melting kettle into the shell,l a central duct extending through the melting kettle and shell into proximity with the lower end thereof, a disthe central duct, and means for causing the How of molten sulphur as it passes downy ,ward to follow a serpentine course to the lower end of the central duct through which the resultinghot gases pass.

6. In a sulphur burner,lthe combination with the burner body, of a melting kettle carried upon the burner body and adapted to discharge molten sulphur into the interior of the burner, a central ducty extending through the kettle into the burner, a duct located centrally in the burner and forming an extension of the aforesaid duct and composed of a. series of sections abutting one against the other, a Supporting base upon which the lowermost section of ,the aforesaid series rests, such base being provided'with radial openings, an imperforate tray extending from each alternate duct section into proximity with the` burner wall to leave an annular surrounding opening and a tray having a portion adjacent the centre perforated and extending from the sections alternating with the sections aforesaid and extending at its outer edge into proximity to the wall4 of the burner and having the space interposed between the edge of such tray and the wall of the burner sealed.

ALBERT GUSTAV l-HNZKE. 

